Motion search method and apparatus for minimizing off-chip memory access

a motion search and memory access technology, applied in signal generators with optical-mechanical scanning, color televisions with bandwidth reduction, etc., can solve the problems of reducing image quality, affecting the quality of images, so as to reduce the amount of off-chip memory access, the effect of increasing the search speed
US20080181310A1Inactive Publication Date: 2008-07-31SAMSUNG ELECTRONICS CO LTD +1
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Patent Information

Authority / Receiving Office
US Β· United States
Patent Type
Applications(United States)
Current Assignee / Owner
SAMSUNG ELECTRONICS CO LTD
Publication Date
2008-07-31
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

A motion search method and apparatus for minimizing an off-chip memory access to reduce cycles for predicting a motion vector. A sum of absolute differences (SAD) calculation processing is performed, while an off-chip memory is accessed using Direct Memory Access (DMA). A position of a current macro block is determined if a frame is input and the length of a horizontal search line is set according to adjacent motion vectors and predetermined external parameters. The SADs are calculated by calculating medians of the adjacent motion vectors as a predictive motion vector, setting a vertical direction value of the predictive motion vector as an initial search line, and sequentially searching at least one horizontal search line, and determining a position of a minimum SAD from the at least one horizontal search line. The minimum SAD position is selected as a final motion vector.
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Description

CLAIM OF PRIORITY

[0001] This application claims the benefit of priority under 35 U.S.C. Β§ 119(a) from a Patent Application filed in the Korean Intellectual Property Office on Jan. 26, 2007 and assigned Serial No. 2007-08387, the contents of which are incorporated herein by reference in its entirety.BACKGROUND OF THE INVENTION

[0002] 1. Field of the Invention

[0003] The present invention relates generally to media processing of motion prediction for image compression technology. More particularly, the present invention relates generally to a motion search method and apparatus for minimizing an off-chip memory access.

[0004] 2. Description of the Related Art

[0005] In the case of digital image data used in many applications, including but in no way limited to video conferencing, High Definition Television (HDTV), Video On Demand (VOD) receivers, Personal Computers (PCs) supporting Moving Picture Experts Group (MPEG) images, game tools, terrestrial digital broadcasting receivers, digital satell...

Claims

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